Self-Study Program

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Changes to Audi A6 05
The seat adjustment control unit and memory has,
apart from a few minor modifications, been adopted
from the Audi A6 ‘05.
The control unit can be installed both as a J136 on
the driver's side and as a J521 on the front
passenger side. The control unit recognises its
installation location automatically based on the
voltage level present at one of its terminal pins.
This method is known as pin encoding.
Driver and front passenger seat adjustment control units
J136 Seat and steering column adjustment control unit with memory with memory function
J521 Seat adjustment control unit with memory, front passenger
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Stored settings
The following settings are stored by when the Save button on the driver side memory block is pressed or
when the vehicle is locked with the remote control key:
– Current position of the left and right exterior mirrors
– Current driver seat settings
– Current steering column position (if electrical steering column adjustment is installed)
The following setting is stored when the Save button on the driver side memory block is pressed:
– Current front passenger seat settings
The driver side control unit J136 can store six different settings. Two settings can be stored with the Save
buttons, the other four with different remote control keys.
However, only two different settings can be stored with the Save buttons for the front passenger side control
unit; it is not possible to store any settings with the remote control key.
The basic prerequisite for all memory operations is that the memory block ON/OFF switch is set to "ON". The
position of this switch is read by software from the driver door control unit J386 and transferred to the CAN
bus. However, the switch position is also transmitted via hardware line through the driver door control unit
and relayed from here to the seat control unit. Here, the hardware line prevents the activation of output
modules for motor activation or disables active output modules.